Fix "Error: spawn npm ENOENT" on windows

[viszkoktamas]

I was running this lib on windows with a few npm_dependencies and i got this spawn npm error.

Fixed with the solution posted on SO: https://stackoverflow.com/a/43285131/11882999

[shawnlobo96]

@viszkoktamas what version of the CLI are you using?

This issue was fixed in 1.11.2.

If you're using something older than 1.11.2, can you give it a try with the latest CLI version?

[viszkoktamas]

@shawnlobo96 I've just upgraded to 1.11.2, now the cli doesn't fails on the error, but the problem is still exists, check this screenshot:

Test run fails on missing dependency of course (the error message is a bit confusing, but same setup works using Ubuntu, and the error message in the first screenshot implies that it is caused by the npm spawn error):

We are using glob module, which is added to the npm_dependencies, but it is not installed because the spawn command can't find the npm on windows. The change in this PR fixes the problem.